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A065699
Values of m such that N = (am+1)(bm+1)(cm+1) is a 3-Carmichael number (A087788), where a,b,c = 1,2,63.
4
156, 2550, 3180, 19686, 29640, 40350, 41610, 43626, 46020, 51060, 65550, 72480, 79536, 80670, 85836, 97176, 133716, 150096, 159420, 170760, 184116, 191550, 214986, 229980, 255180, 262110, 278490, 279120, 293106, 294996, 301926, 337080, 350940, 369210, 370596
OFFSET
1,1
LINKS
FORMULA
am+1, bm+1, cm+1 are primes and am|(N-1), bm|(N-1), cm|(N-1).
MATHEMATICA
carmQ[n_] := CompositeQ[n] && Divisible[n - 1, CarmichaelLambda[n]]; Select[Range[10^5], AllTrue[(v = {1, 2, 63}*# + 1), PrimeQ] && carmQ[Times @@ v] &] (* Amiram Eldar, Oct 17 2019 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Harvey Dubner (harvey(AT)dubner.com), Nov 14 2001
EXTENSIONS
More terms from Amiram Eldar, Oct 17 2019
STATUS
approved